Sifting testing-machine.



W. J. BELL. SIFTING TESTING MACHINE. APPLICATION, FILED JUNE 15. I915-Patented Mar. 7, 1916.

3 SHEETSSHEET 1.

W. J. BELL. SIFTING TESTING MACHINE.

APPLICATION FILED JUNE 15. I915. 1 174 657. Patented Mar. 7, 1916.

3 SHEETS-SHEET 2.

THE COLUMBIA PLANOGRAFH cu, WASHINGTON, D c.

'W. J. BELL. SIFTING TESTING MACHINE. APPLICATION FILED JUNE I5, 1915.

1 1 74,657. Patented Mar. 7, 1916.

3 SHEETS-SHEET 3.

THE COLUMBIA PLANOGRAPH co, WASHINGTON, D. c.

WILLARD J. BELL. OF NEWAYGO, MICHIGAN.

SIFTING TESTING-MACHINE.

Specification of Letters Patent.

Patented Mar. 7, 1916.

Application filed June 15, 1915. Serial No. 34,159

To all who m it may concern:

Be it known that I, WILLARD J. BELL, a citizen of the United States,residing at Newaygo, in the county of Newaygo and State of Michigan,have invented or discovered certain new and useful Improvements inSifting Testing-Machines, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to certain improvements in the sifting testingmachine shown and described in my Patent No. 1,120,012, granted December8, 191 1, and the present invention has for its object to render themachine of my said patent more convenient and effective in use, as willhereinafter more fully appear.

In the accompanying drawings Figure 1 is a front View of the improvedsifting testing machine. Fig. 2 is a plan view thereof, and Fig. 3 is aside view looking to the right of Figs. 1 and 2.

Referring to the drawings, the base of the machine consists of a portionmade in the form of a closed box 12 adapted to be filled with oil to apoint high enough to insure perfect lubrication of all of the workingparts contained therein, said box being provided with supporting legs 13and with a projecting table portion 1a. Mounted in said base is adriving shaft 15 which may be operated from any suitable source ofpower, as a motor 16 mounted on said table portion 1a and having aclutch connection with said driving shaft, or the said driving shaft maybe operated from an independent source of power belted to apulley on theshaft 15. The said shaft 15 is provided with a pinion 18 meshing with agear wheel 19 on a shaft 20 journaled in the box portion 12 of the baseand connected by bevel gears 21 with two vertical shafts 22 supported bythe standards 23 and carrying eccentrics 24: for operating the lower andupper shaking plates 25 and 26. This mechanism by which the shakingplates are operated is essentially the same as in the machine of my saidPatent No. 1,120,012, hereinbefore referred to.

Mounted in the shaking plates 25 and 26 are two upright rods 27, andadjustably attached to the said upright rods, by means of clampingscrews 28, is a carrying bar 29 on which are mounted the springs 30which, collectively, afford a yielding support for the series ofsuperposed testing sieves 31 The screws 28 pass through split portionsof said bar 29. It will be understood that by ralsing Or lowering thecarrying bar or plate 29 on the rods 27 the height of the series ofsieves, or the number of sieves to be used, may be varied, as isfrequently desirable in making tests of different kinds of pulverizedmaterials.

In order to provide for a convenient introduction or removal of a seriesof superposed sieves without passing them down or lifting them upthrough the top shaking plate 26, the said shaking plate, in the form ofthe invention herein shown, is provided with ahinged section 26 hung onhinges 32 and thus adapted, when the top plate 33, which rests on thesieves is removed, to be tipped up backward so that a series of sievesmay be conveniently introduced to or removed from the front of themachine. The upper shaking plate 26 is provided with lugs 3f overhangingthe top plate 33 and serving to retain the sieves in place during theshaking operation, in that the sieves will be pressed upward by thesprings 30 so that the top plate will be held in contact with said lugs.This construction is simpler and more desirable than the U-shapedholding strap employed in the construction shown in the patenthereinbefore referred to.

Journaled in the base of the machine is a hammer-operating shaft 35having a chain and sprocket gear connection with the shaft 20, as in themachine of my said. patent, the said shaft being provided with a jog cam36 on which rests a foot piece 37 at the base of a lifting rod 38 whichimpinges at its upper end against a hammer bar 39 carrying a hammer 10adapted to strike against an impact block 41 mounted on the top plate83, to percussively jar the series of sieves, when said hammer is inoperation. The hammer bar 39 is pivotally mounted at the top of astandard. 42. This percussive agitating mechanism is similar to that ofmy patent hereinbefore referred to, but in the present instance only asingle hammer is employed.

From the foregoing it will be understood that the present inventionprovides convenient means whereby a series of testing sieves may beconveniently placed in or removed from their working position in themachine, and also provides means whereby the num ber of testing sievesmay be varied, as may be desired. The vertical or upright rods 27 serveto rigidly connect the shaking plates and 26 and thus a stifi shakingwell adapted to receive the percussive of the hammer 40, is provided.

aving thus described my invention I claim and desire to secure byLetters Patent:

1. In a sifting testing machine, a top shaking plate provided with ahinged front part which may be lifted for the convenient introduction orremoval of a series of testing sieves.

2. In a sifting testing machine, the com bination with means foragitating a superposed series of sieves, of a vertically adjustablebottom spring support for said sieves, so that the height of a columnofsieves or the number of the same may be varied, when desired, byraising or lowering said support, and stops at the top of the column ofsieves and toward which the latter are urged by said spring support.

3. n a sifting testing machine, the combination with upper and lowershaking plates and means for operating same, of vertical rods mounted inand connecting said shaking plates, a carrying bar or plate forsupporting a series of testing sieves, said frame,

action carrying bar or plate being adjustably attached to said verticalrods.

4. In a sifting testing machine, the combination with lower and uppershaking plates and means for operating same, of a top plate to rest on aseries of sieves, the said upper shaking plate being provided with lugsoverhanging said top plate, a spring support for a series of sieves andby which the latter may be forced upward so as to hold the same inproper working position by the cooperation of said top plate and lugs.

5. In a sifting testing machine, the combination with upper and lowershaking plates and means for operating same, of vertical rods mounted inand connecting said shaking plates, a carrying bar or plate forsupporting a series of testing sieves, said carrying bar or plate beingadjustably attached to said vertical rods and being provided withsprings affording a yielding sup port for the column of sieves.

In testimony whereof I afliX my in presence of two Witnesses.

WILLARD J. BELL.

signature,

- Copies of this patent may be obtained for five cents each. byaddressing the Commissioner of Patents,

Washington. D. C.

